ptn3500dh NXP Semiconductors, ptn3500dh Datasheet - Page 6

• Manufacturer Part Number: ptn3500dh
• Description: Maintenance And Control Device
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Quasi-bidirectional I/Os (see Figure 11)
A quasi-bidirectional I/O can be used as an input or output without the use of a control signal for data direction. At power-on the I/Os are HIGH.
In this mode, only a current source to V
These devices turn on when an output is written HIGH, and are switched off by the negative edge of SCL. The I/Os should be HIGH before
being used as inputs.
2001 Jan 17
Maintenance and control device
SYMBOL
t
t
t
pv
ps
ph
P3
OUTPUT
VOLTAGE
P3
PULL-UP
OUTPUT
CURRENT
SDA
SCL
START CONDITION
Input data setup time; C
Input data hold time; C
S
Figure 11. Transient pull-up current I
Output data valid; C
SLAVE ADDRESS (PTN3500)
0
1
1
2
PARAMETER
0
3
0
4
DD
A2 A1
5
L
is active. An additional strong pull-up to V
L
L
6
100 pF
100 pF
100 pF
A0
7
R/W
0
8
A
ACKNOWLEDGE
FROM SLAVE
OHt
while P3 changes from LOW-to-HIGH and back to LOW
MIN
DATA TO PORT
0
4
6
P3
1
DD
I
OHt
allows fast rising edges into heavily loaded outputs.
TYP
A
ACKNOWLEDGE
FROM SLAVE
DATA TO PORT
P3
0
MAX
4
Product specification
PTN3500
A
I
OH
P
UNIT
SW00757
s
s
s